40 REPORT OF THE STATE ENTOMOLOGIST I92I 



SO far as probable injury another season is concerned. These 

 reasons lead us to doubt the advisability of recommending syste- 

 matic fall plowing or other methods designed to bring about the 

 destruction of the caterpillars so numerous in infested corn fields 

 in the fall, because there is such a slight probability of their win- 

 tering successfully. 



There may be some sections of the State where this pest is 

 sufificiently abundant from year to year to warrant systematic 

 repressive measures ; in such cases, fall plowing for the destruction 

 of the hibernating insects may well be generally followed. 



In other areas, it is suggested that careful watch be kept for the 

 few early appearing caterpillars and if they occur in midsummer, 

 the last of June or early in July, there is at least a fair probability 

 of some to very material injury developing later. Under such con- 

 ditions in areas where sweet corn is largely grown or even in more 

 highly prized garden plots, injury may l>e greatly decreased by 

 dusting the silk of the developing ears with a mixture of 50 per 

 cent powdered arsenate of lead and 50 per cent of finely ground 

 sulphur. The first treatment should be given soon after the silk 

 appears and this followed by one or two others before the corn is 

 ready to pick. 



RASPBERRY BEETLE OR RASPBERRY BYTURUS 

 Byturus unicolor Say. 



Small, light brown raspberry beetles were extremely abundant 

 May 13, 1921 in several raspberry plantings belonging to C. J. Hep- 

 worth, Milton. An examination on that date in company with 

 J. B. Palmer of the state spray service resulted in finding one to 

 four or five beetles in many of the opened blossoms. It was esti- 

 mated that presumably half of the commercial value of the crop had 

 been destroyed by the insects feeding in the developing buds. 

 Instinct seems to compel them to bore into buds and to force their 

 way between the folds of developing leaves or into partly expanded 

 flowers. This habit makes satisfactory poisoning very difficult, if 

 not impossible. 



Mr Palmer stated that growers in that section were advised to 

 spray immediately after he found the first beetles and in one plot 

 there had been four applications of arsenate of lead, using 3 pounds 

 of paste to 50 gallons of water. The beetles were still somewhat 

 numerous at the time of examination, although the condition of the 

 bushes indicated thorough and effective spraying. There was a 



